Chimney or smokestack ventilator



j Dec. 4 1923.

A. H. CAMPBELL CHIMNEY OR SMOKESTAGK VENTILATOR Filed April 17. 192 2 2sheets-sheet 1 Dec. -4 1923.

A. H. CAMPBELL CHIMNEY on SMOKESTAGK VENTILA'IOR 1922 2 Sheets-$heet 3Filed Apri], 17

Patented Dec. 4, 1923.

AUSTIN H. CAMPBELL, F PROSPECT, PENNSYLVANIA.

CHIMNEY OR SMOKESTACK VENTILATOB.

Application filed April 17, 1922.

To all whom it may concern Be it known that I, AUSTIN H. CAMPBELL,

a citizen of the United States, residing at Prospect, in the county ofButler and State of Pennsylvania, have invented certain new and usefulImprovements in Chimney or Smokestack Ventilators, of which th followingis a specification.

This invention relates to new and useful improvements in chimney orsmoke stack ventilators, and has for its object to provide a device ofthis character which will prevent the wind or unnatural draft fromentering the chimney or smoke stack and thus materially dampen ordiminish the fire but will, at the same time, allow the natural draftthrough the chimney or smoke stack. \Vith the foregoing and otherobjects in view that will appear as the nature of my invention is betterunderstood, the same consists in the novel features of construction,combination and arrangement of parts illustrated in the drawings andmore particularly pointed out in the appended claim.

In the accompanying drawings, which are for illustrative purposes onlyand are therefore not drawn to scale Figure 1 is a side elevation,illustrating the application of my invention to the smoke 3o stack of alocomotive.

Figure 2 is a fragmentary rear elevation of the smoke stack with myventilator applied, the parts represented on an enlarged scale.

Figure 3 is a vertical transverse section,

' taken on line 33 of Figure 2 and Figure 4 a top plan view of mydevice.

Referring to the drawings for a more particular description of myinvention and 40 in which drawings like parts are designated by likereference character throughout the several views, A designates theboiler of a locomotive, B the smoke stack and 3 my improved ventilator,as a whole, applied to the smoke stack.

Specifically, my device comprises an annular rim or support a composedof two corresponding semi-circular sections 1 and 2 which completelyencircle or embrace the smoke stack or chimney near the top and areformed at their adjacent or abutting ends with upstanding and dependinglugs 3 and Serial No. 553,335.

4:, respectively, fastened together by bolts 5 or other equivalentmeans. I

The rim or support a is provided on its outer surface with an annularflange or bead 6 which fits in a corresponding recess 7 formed in theinner edge of the ring or carriage 8 completely encircling and rotatablein either direction on said rim or support. The ring or carriage 8 isprovided at the front with an integral semi-circular offset rim 9 whichcarries the rigid semi-circular sheet metal shield or deflector 10 whichextends a suitable distance above the top of the smoke stack or chimneyand is movable with the ring or carriage.

The rim or support a is secured to-the smoke stack or chimney by thedepending lugs 11 and is formed in its bottom edge with an annular rack12 whose teeth intermesh with those of a pinion 13 rotatably mounted inthe hanger or bearing bracket 14 bolted, as at 15, to the bottom wallor'edge of the rim or support. The shaft 16 of the pinion 13 is providedwith a pulley 17 to which is attached one end of a cable 18 or otherflexible element whose free end extends to within convenient reach ofthe operator and whereby the shield or deflector may be turned to facethe wind. By this arrangement, the wind or unnatural draft is preventedfrom entering the smoke stack or chimney and thus depress or diminishthe fire, while the natural draft of air is permitted to pass throughthe openings 19 between the outer edge or wall of the ring or carriage 8and the'inner wall of the rim 9 and enter thesame.

While my device is shown in the present illustration as applied to thsmoke stack of a locomotive, it may be used with equal facility inconnection with stationary boilers or chimneys.

From the foregoing description taken in connection with thedrawings, itis thought that the construct-ion, operation and advantages of myinvention will be readily understood without requiring a more extendedexplanation.

Having described my invention what I claim as new and desire to secureby Letters Patent, is

A stack ventilator comprising arim adapt:

ed to be applied to the stackand provided upon its outer face With anoutstanding annular flange, a carriage surrounding the rim and providedat its inner face with an annular recess which snugly receives saidflange, means mounted on the run for turning the carriage upon the run,a frame carsemi-cylindrical shield mounted upon said 1 spaced portionsof the frame.

In testimony whereof I, my signature. I

AUSTIN CAMPBELL.

